252490309643 has 32 divisors (see below), whose sum is σ = 298177001472. Its totient is φ = 210777811200.

The previous prime is 252490309639. The next prime is 252490309667. The reversal of 252490309643 is 346903094252.

It is not a de Polignac number, because 252490309643 - 2² = 252490309639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252490309613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75798488 + ... + 75801818.

It is an arithmetic number, because the mean of its divisors is an integer number (9318031296).

Almost surely, 2^252490309643 is an apocalyptic number.

252490309643 is a deficient number, since it is larger than the sum of its proper divisors (45686691829).

252490309643 is a wasteful number, since it uses less digits than its factorization.

252490309643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5955.

The product of its (nonzero) digits is 1399680, while the sum is 47.

The spelling of 252490309643 in words is "two hundred fifty-two billion, four hundred ninety million, three hundred nine thousand, six hundred forty-three".